Allow all mailbox users to send emails up to 100 recipients (Exchange 2010)

Greetings,

Could you please help on writing a Powershell script using Exchange Management Shell on how to realize the following:

I want to grant all recipients the ability to send emails up to 100 recipients, this rule will be applied by default to all mailboxes including the new created ones and the old ones.

FYI, i tried the following cmdlets from the organizational level:

Set-TransportConfig -MaxRecipientEnvelopeLimit 100 

This cmdlet did not applied to all mailboxes, because i have found some ones have unlimited RecipientLimits, some others have more than 100, newly created mailboxes are unlimited by default !

Here is the cmdlet i have used to verify theRecipientLimits one some mailboxes: 

Get-Mailbox -Identity"username" | Select-Object RecipientLimits | fl

I want to force all users including the new and old ones to have RecipientLimits to 100, and if a user needs more than 100 i can grant him/her explicitly.  

Thanks in advance.

Redouane 

Redouane SARRA